package 验证回文串.src.test;

public class testisLetterOrDigit {
    public static void main(String[] args)
    {
        System.out.println(Character.isLetterOrDigit('a'));
        System.out.println(Character.isLetterOrDigit('.'));
        System.out.println(Character.isLetterOrDigit(' '));
        System.out.println(Character.isLetterOrDigit('1'));
    }
}
